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发明名称
Improvements in or relating to automatic telephone systems
摘要
申请公布号
GB710161(A)
申请公布日期
1954.06.09
申请号
GB19520004751
申请日期
1952.02.22
申请人
TELEFONAKTIEBOLAGET L M ERICSSON
发明人
分类号
H04Q3/00
主分类号
H04Q3/00
代理机构
代理人
主权项
地址
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